(19)

(11)

EP 2 018 232 A1

(12)

(43) Date of publication: 28.01.2009 Bulletin 2009/05 (21) Application number: 07728682.1 (22) Date of filing: 01.05.2007

(51) International Patent Classification (IPC):  B09B 3/00(2006.01) C02F 11/00(2006.01) (86) International application number: PCT/EP2007/054228 (87) International publication number: WO 2007/134952 (29.11.2007 Gazette 2007/48)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 19.05.2006 GB 0609998 (71) Applicant: Ciba Holding Inc. 4057 Basel (CH)	(72) Inventors: BELLWOOD, John Gerard Jiliby, New South Wales 2259 (AU) DYMOND, Brian West Yorkshire BD12 8DE (GB)